Can I buy my Friends and Family Tickets on the door? Unfortunately not, these have to be purchased in advance. For more information, please visit the Merlin Annual Pass website. Related articles How much are tickets to SEA LIFE London? How can I buy tickets for SEA LIFE London? Can I purchase Friends and Family Tickets, although I will not be attending with my Merlin Annual Pass? Can I book my disabled tickets online? Can I use a 2 for 1 voucher at SEA LIFE London?